This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A010542 #21 Feb 11 2025 14:47:20
%S A010542 9,5,3,9,3,9,2,0,1,4,1,6,9,4,5,6,4,9,1,5,2,6,2,1,5,8,6,0,2,3,2,2,6,5,
%T A010542 4,0,2,5,4,6,2,3,4,2,5,2,5,0,5,4,5,7,5,3,9,0,8,1,5,1,8,5,2,9,1,0,3,6,
%U A010542 2,5,5,2,3,0,5,6,5,0,7,2,1,8,2,7,7,8,2,1,7,6,4,4,9,1,2,2,0,6,9
%N A010542 Decimal expansion of square root of 91.
%C A010542 Continued fraction expansion is 9 followed by {1, 1, 5, 1, 5, 1, 1, 18} repeated. - _Harry J. Smith_, Jun 11 2009
%H A010542 Harry J. Smith, <a href="/A010542/b010542.txt">Table of n, a(n) for n = 1..20000</a>
%H A010542 <a href="/index/Al#algebraic_02">Index entries for algebraic numbers, degree 2</a>.
%e A010542 9.53939201416945649152621586023226540254623...
%t A010542 RealDigits[N[Sqrt[91],200]][[1]] (* _Vladimir Joseph Stephan Orlovsky_, Feb 04 2012 *)
%o A010542 (PARI) { default(realprecision, 20080); x=sqrt(91); for (n=1, 20000, d=floor(x); x=(x-d)*10; write("b010542.txt", n, " ", d)); } \\ _Harry J. Smith_, Jun 11 2009
%o A010542 (Python)
%o A010542 from math import isqrt
%o A010542 def aupton(nn): return list(map(int, str(isqrt(91 * 10**(2*nn)))))[:nn]
%o A010542 print(aupton(100)) # _Michael S. Branicky_, Sep 05 2021
%Y A010542 Cf. A010162 (continued fraction).
%K A010542 nonn,cons
%O A010542 1,1
%A A010542 _N. J. A. Sloane_